Mercury 2.5 Preview vs GPT-5.6 Sol: side-by-side summary

Mercury 2.5 Preview and GPT-5.6 Sol are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Mercury 2.5 Preview, from inception, has a 260,000-token context window and is priced at $0.04/M tokens input, $0.15/M tokens output on OpenRouter.

GPT-5.6 Sol, from OpenAI, has a 1,050,000-token context window and is priced at $2/M tokens input, $10/M tokens output on OpenRouter.

Context window

• Mercury 2.5 Preview: 260,000 tokens
• GPT-5.6 Sol: 1,050,000 tokens

Price

• Mercury 2.5 Preview: $0.04/M tokens input, $0.15/M tokens output
• GPT-5.6 Sol: $2/M tokens input, $10/M tokens output

Provided by

• Mercury 2.5 Preview: inception
• GPT-5.6 Sol: OpenAI

• Mercury 2.5 Preview model details, providers and pricing
• GPT-5.6 Sol model details, providers and pricing